Multifour is a term that refers to someone who is multigender, multisexual and/or m-spec in general, multipronominal, and multinominal. One's name, pronouns, gender, and orientation be fluid or static, situational or non-situational, etc. As long as one's labels and identity fall under the umbrella of all of these terms, they may use it.
Similar terms include Fluid-fluid-fluid, a combination term for name/pronoun/and genderfluid individuals.
History and Flag
"Multifour" was coined by fandom user johnnienotjohnny on June 19, 2021. The flag was made the same day, combining a few of the the colors from the multigender, multisexual, multipronominal, and multinominal flag following the diagonal tilt of the multipronominal flag.